Mining implement.



W. 0. SNELLING.

MINING IMPLEMBNT.

APPLIUATION FILED Nov. 2a, 190B.

Patented Aug. 26, 1913.

2 SHEETS-SHEET 1.

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COLUDUJA FLANOGRAPH CO.,WASHNGTON D. C.

W. 0. SNELLING.

MINING IMPLEMENT.

APPLICATION FILED Nov. 2s, 190e.

1,071,270. Patented Aug. 26, 1913.

2 SHBETB-SHEET 2.

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i mi tri. t.) a tali-EMU WALTER O. SNELLING, OF PITTSBURGH,PENNSYLVANIA.

MINING IMPLEMENT.

Specification of Letters Patent.

Patented Auen 26,1913.

Application led November 23, 1908. Serial No. 464,156.

To all whom may concern.'

Be it known that I, VVAL'rnR O. SNnnLiNG, a citizen of the UnitedStates7 residing at Pittsburgh, in the county of Allegheny and State or'Pennsylvania; have invented certain new and useful Improvements inMining Implements, of which the following is a specification.

rlhis invention relates to mining or tunneling machines or implements,the object of the invention being the provision of a tool or implementadapted to fracture a body oi coal, salt or other massive material andto loosen or detach portions thereof.

ln the preferred embodiment of the invention the implement carries anexpansible and movable member which may be inserted into an opening ordrill hole in a body of coal or the like, and expanded therein toproduce fractures extending into or through the mass, after which theexpanded member may be moved or withdrawn longitudinally in such manneras to detach the loosened portions of t-he mass.

Certain embodiments of the invention are illustrated in the accompanyingdrawings; wherein Figure l is a vertical section showing the implementin place and illustrating its mode of operation; Fig. 2 is a side Viewof a handoperatcd implement; Fig. 3 is a side view ot a portion of asimilar implement having a drill attachment; Fig. et is a partial sideview et the implement shown in Fig. 2, illustrating the toggle mechanismin its eX- panded and locked position; Figs. 5, (3 are a side elevationand plan respectively of a modified construction; and Fig. 7 is a sideelevation illustrating one mode of mounting and operating a plurality ofpower driven implements.

tet'erring particularly to Figs. l, 2 and et, l represents the stock ofthe tool, provided with screw threads as shown. At one end of the stockis secured a ratchet wheel 2; actuated by'a reversible pawl 3, which maybe of any usual construction and is carried by a handle 1l. At the otherend of the stock l is an abutment 5, the screw threads being omittedfrom the adjacent threaded portion of the stock.

able thereon by rotation oit the stock, while the internal diameter ofthe collar 7 is su [icient to permit it to slide freely upon the Itresults from this construction that by rotation of the stock l underconditions preventing the simultaneous rotation of the collars, as whenthe toggle levers are firmly held by being pressed against the sides ofthe drill hole, the collars may be caused to approach or to -recede fromeach other with corresponding expansion or retraction oit the togglelevers. After insertion of the apparatus into the drill hole a quickmovement ot the rod will, through the inertia of the toggle mechanism;cause the elbows of the toggle to engage the irregular sides ofthe hole;and by such engagement will hold the toggle against rotation; thefurther turning of the screw will cause the screw-threaded sleeve tomove toward the end of the stock l, thereby torcing the elbowsoutwardly. The term expanded"7 is employed as referring to the levers inthe position which they assume when the collars are caused to approacheach other or are locked together, the term retracted expressing theposition of the lcvers when the collars are moved apart.

It is preferred to provide suitable mechanism for locking the collarstogether in the fully expanded position of the toggle levers, one formof device ior this purpose being as show-n in Figs. 2, 3 and di andcomprising a latch l2 pivotally mounted on one et' the collars at 13,this latch having a stop la and adapted to engage a pin or boss lo onthe other collar. The collars are shown in their locked position, andthe levers in their fully expanded position, in Fig. Ll.

The operation of the device as above dcscribed is as follows: The coalor other material is preferably undercut in the usual manner asindicated at 1G in Fig. l, and any desired number of holes of sutlicientsize to receive the implement are drilled inl proper relation to theundercut. These holes may conveniently be drilled by .the implementitself which may be provided for this purpose with a. separable drillingattachment carried by the abutment 5 as shown at 17 in Fig. 3. Theimplement is then inserted into the hole as indicated in Fig. 1, and byrotation of the stock the collar 8 is caused to approach the collar 7and to loclr therewith, thereby expanding the toggle levers and exertinga powerful pressure upon the mass and fracturing the same as indicatedin Fig. 1. The direction of rotation of the stock is then reversed,whereby the expanded toggle levers are moved longitudinally of thestock, exerting an outward pressure upon the mass of material anddetaching or dislodging portions thereof. rIhe portions so dislodged mayof course be permitted to fall directly to a chute or mine wagon, or maybe handled in any usual or preferred manner as will be readilyunderstood by those skilled in the art. The collars may now be separatedthereby returning the levers to their initial position, and theoperation repeated.

In Figs. 5, 6 I have illustrated a modified form of the apparatus inwhich the rotatable stock is replaced by parallel rack-bars 18, 19, eachof the toggle levers 9, 10 being mounted upon these bars as shown insuch manner that they may be expanded or retracted as desired. 20represents a pinion mounted on a shaft 21 and adapted to engage eitherof the rack-bars 18, 19, at will, or to simultaneously engage both ofsaid rack-bars, this being conveniently effected by providing means,notshown, for reciprocating the shaft 21 in the direction of its length. Inthe operation of this form of device the toggle levers are retracted andthe implement inserted into the drill hole; then by the forward movementof the rackbar 19, the bar 18 being meanwhile firmly held the levers areexpanded, fracturing or loosening the mass. The pinion 2O is then movedinto engagement with both rack-bars, thereby locking them, and byreversing the direction of rotation of the shaft 21 the loosenedmaterial is dislodged as above described.

It will be obvious that the device may be otherwise modified withoutdeparture from the spirit of my invention: for instance, a plurality ofexpanded members, adapted either for simultaneous or successiveoperation, may be mounted on a single bar or rod, either rotary orreciprocating.

The implement may be operated by hand or by power applied in anysuitable manner, and the desired number of implements may be mounted toact jointly and simultaneously, or progressively and successively. Thusin Fig. 7 1 have shown a plurality of implements of the type shown inFig. 3 mounted upon a wheeled truck or car 22 and adapted to be actuatedthrough suitable gearing or power-transmitting means from any desiredsource of power, as for example an electric motor 23 carried by thetruck. This arrangement is hiO'hly edective in practice, as the severalexpanding members may be caused to exert pressure simultaneously upondifferent portions of a mass to be fractured or dislodged, whereby largemasses may be loosened or detached. lt is also practicable by merelygiving to the several expanding members, whether mounted upon single rodor upon separate rods, a different initial set, to bring to bear uponthe mass of material to be fractured a progressive pressure alongpredetermined lines, whereby fractures of great extent may be readilyproduced. Obviously the same result may be secured by suitably varyingthe size or power of the several expanding members.

I claim:

1. A mining implement, comprising a movable rod or bar, an expansiblemember operated thereby, said member adapted for insertion into a drillhole or bore, means connecting said rod or bar and expansible member,means for expanding said expansible member by a movement of the rod orbar in one direction and to withdraw said expanded member when locked bya movement of said rod or bar in the opposite direction, and means forlocking said expansible member in an expanded position.

2. A mining implement, comprising a movable rod or bar, an expansiblemember mounted thereon and operated thereby, said rod or bar and memberadapted for insertion into a drill hole or bore, means eonnecting saidrod or bar and expansible member, means for expanding said expansiblemember by a movement of the rod or bar in one direction and to withdrawsaid expanded member when locked by a movement of said rod or bar in theopposite direction, and means for locking said expansible member in anexpanded position.

3. A coal mining tool, comprising a screwthreaded rod or bar, ringsmounted thereon one of which is screw-threaded to engage thescrew-threads of the rod or bar, toggle-levers connecting the rings,means for expanding the toggle-levers and means on said rings forlocking the toggles in expanded position.

4. A mining implement, comprising a screw-threaded rod or bar, ringsmounted thereon one of which is screw-threaded to engage thescrewthreads of the rod or bar, toggle-levers connecting the rings,means for moving the toggle-levers into their expanded position, andautomatic means for locking said levers in said expanded position.

5. A mining implement, comprising a screw-threaded rod or bar, ringsmounted thereon one of which is screw-threaded to engage thescrew-threads of the rod or bar, toggle-levers connecting the rings,inea-ns for effecting a relative movement of the said rings and therebymoving the toggle-levers into their expanded position, and Ineensoarried by the said rings for looking the togglelevers in said expandedposition. 10 In testimony whereof, I ailix my signature in presence oftwo Witnesses.

VALTER O. SNELLING. Witnesses WILLIAM TAYLOR,

I. W. ENGLAND.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents. Washington, ZD. C.

